Folded paper edge opening process
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United States of America Patent
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-
Mar 25, 1980
Grant Date -
N/A
app pub date -
Sep 27, 1978
filing date -
Sep 27, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided for the opening of envelopes made of cellulosic paper in which there is applied to at least one envelope edge as the sole reactant with the cellulose therein a non-noxious organic acid having at least one pK value at room temperature between about 1.5 and about 5, followed by the application of heat and mild mechanical action to the envelope edge.
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